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(No Model.) I beets-sheet 1.

. I; B. ALMY.

PRESSER FOOT FOR SEWING MAGHINES.

No. 419,303. Patented Jan. 14, 1890.

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N. PETERS, HualwLrlhegraph-r, WuhinglnlflLC- (-No Model.) 2Sheets-Sheet- 2.

V I; B. ALMY. I PRESSB R FOOT FOR SEWING MACHINES.

No. 419,303. v Patented Jan. 14, 1890.

Fl EIVI j UNITED STATES PATENT OFFICE.

FERDINAND B. ALMY, OF PROVIDENCE, RHODE ISLAND.

PRESSER-FOOT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 419,303, dated January14, 1890.

Application filed April 8, 1887. Serial No. 234,16l. (No model.)

To all whom it may concern.-

Be it known that I, FERDINAND B. ALMY, residing at Providence,Providence county, and State of Rhode Island, have invented a new andImproved Presser-Foot for Sewing- Machines, of which the following is afull, clear, and exact description.

My invention is in the nature of an improvement in presser-feet forsewing-machines, designed mainly to secure a uniform blind seam, stitch,or hem with any thickness of material, and in which the stitches areallowed to show only on one side of the hem, being invisible upon theother side.

The improvement relates to that form of presser-foot in which a movablespringpressed section or bar is attached to the presser-foot and capableof descending to a lower level than the lower face of the presserfootproper; and it consists in the peculiar construction and arrangement ofa presserfoot bisected longitudinally and having one of its sectionspressed downward by a spring and capable of a double adjustment, ashereinafter fully described.

Figure 1 is a side elevation of the improved presser-foot with the lowerposition of the spring-pressed section indicated bv dotted lines. Fig. 2is a rear view of the same. Fig.

3 is a front view of the two sections of the presser-foot in verticalsection through the line 00 00' of Fig. 1. Fig. 4 is a detail of thespring. Fig. 5 is a perspective View of the presser-foot shown appliedto the fabric in forming the blind seam. Fig. 6 is a similar view withthe spring-section of the presserfoot broken away to show the passage ofthe needle through the material in forming the blind seam. Fig. 7 is aside view of the presser-footin the act of forming the blind seam, andFigs. 8 and 9 are respectively an inside and outside view of the blindseam when formed in the fabric.

Referring to Figs. 1, 2, and 3, the presser-foot is bisectedlongitudinally, so as to form two sections 0 and D, of which 0 is rigidwith the presser-foot bar, while D is pivotally connected to C by ascrew A, which forms a horizontal axis of articulation. Around thisscrew and resting between the two sections 0 and D of the pressen-footare disposed the coils of a short spiral spring 13, Fig. 4, one of Thesection D of the presser-foot is offseta short distance from the section0 to permit the interposition of the spring, and this section D may beadjusted laterally toward section C by simply turning up screw A, sothat the same devices which render this section D flexible verticallyalso permit av lateral adjustment to be given to it. The purpose of thisadjustment will be explained hereinafter.

In forming the blind seam shown in Figs. 8 and 9 the material is foldedupon itself, as shown in Fig. 5. The rigid section 0 of the presser-footrests upon the thickened fold, and the spring-pressed section D drops tothe lower level of the single thickness of the material, and thismaterial is smoothly fed along by the action of the sewing-machine feedwithout reference to the thickness of the material, as the section Dadapts itself automatically to the same, thus obviating the necessity ofhaving gages of different sizes for the presser-foot. The purpose of thelateral adjustment of the section D can also now be understood, for ifit is desired to have the needle pass through agreater amountof'material at the bend E, as is required when athicker material isused, the movable section is to be set farther away from the needle,(see Fig. 6,) so as to enable the needle to take a greater bite in thecloth, and when thinner goods are used the movable section must be setcloser to the needle to prevent the needle from taking so deep a bite asto show the stitch on the fair side of the blind seam. This presseifootpossesses the further advantage of having no interruption on its underside to the passage of the cloth, both sections being perfectly smoothon the under side and of sub stantially equal length and shape. Thispermits. the presser-foot to act as an ordinary presser-foot when on auniform thickness of cloth, allowing the lower surfaces of both sections(3 and D in that case to rest in the same plane. This avoids thenecessity of having to remove the resser-foot and put on another in anytemporary change from blind-seam work to ordinary work.

l-Iaving thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A PI'GSSBP'fOOifor a sewing-machine, consisting of a rigid sectionand an articulated section, having a vertical oscillation, lying besidethe rigid section, a set-screw passing horizontally through thearticulated section, a spiral spring wound about the said set screwbetween the sections and having one end locked against the rigid and theother against the movable section, the said set-screw and spiral springserving the double function of the flexible vertical articulation of the11lovable section and also the lateral adjustment of the same,substantially as shown and described.

2. A presser-foot bisected vertically and longitudinally, and having thetwo parts of substantially equal length and shape, in combination with aseirscrew joining the two together, a spiral spring wound about thesetscrew between the sections and locked respectively against thesections, the said sctscrew and spring serving the double function offlexible vertical articulation for the movable section and the lateraladjustment of the same, substantially as shown and described.

FERDINAND B. ALMY.

\Vitnesses:

EDWARD D. BASSETT, FREDERIO HAYES.

